One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10)(11,20)(12,22)(13,18)(14,24)(15,19)(16,21)(17,23) involution — undirected(3,8)(5,6)(9,11)(10,16)(12,19)(13,21)(14,22)(15,17)(18,23)(20,24) involution — undirected(2,5)(3,8)(6,7)(9,12,15,16)(10,17,19,11)(13,23,14,20)(18,21,24,22)(9,13,15,14)(10,18,19,24)(11,21,17,22)(12,20,16,23)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.